Marceau
| Name | Marceau |
| Type | Sailing vessel |
| GRT | 292 tons |
| Country |  French |
| Built | 1911 |
| Builder | G. Gaurier, St. Malo |
| Operator | J. Chevalier, St. Malo |
| History | Three-masted schooner. |
U-boat attacks on Sailing vessel Marceau
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 25 Sep 1917 | U 54 (Kurt Heeseler) | Sunk | Stoped and sunk by gunnery. | 46° 15'N, 9° 42'W | Saint Pierre and Miquelon - La Pallice | codfish | 0 |
Position of attack on Marceau
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